Carbohydrates lab

I really enjoyed this lab. It was cool to see what kind of sugars were in the food i eat. for example double bubble bubble gum, the gum that i always chew has monosaccarides in it, Same with skittles.

 

To find this out first we had to crush up the food we were testing and mix it with water in a beaker. Then we had to separate the substance between two different test tubes one we put iodine into and put it back into the rack. The other we mixed Benedict's solution into and put it into boiling water. After a minute we took the Benedict's solution out of the boiling water and put it into the rack with the iodine.

 

When the lab was over the Monosaccarides had a bright orange Benedict's solution and a clear brown iodine. The disaccharides had a Light blue Benedict's solution and a clear brown iodine. the polysaccharides had no change in the Benedict's solution and a dark brown iodine.

I learned a lot in this lab. But one thing i  was still wondering about is why does the iodine change the polysaccharides so much and the monosaccaride just a little.  But i figured it out now.